1 files changed, 548 insertions, 0 deletions
diff --git a/third_party/libwebrtc/rtc_base/buffer_unittest.cc b/third_party/libwebrtc/rtc_base/buffer_unittest.cc
new file mode 100644
index 0000000000..b56118afde
--- /dev/null
+++ b/third_party/libwebrtc/rtc_base/buffer_unittest.cc
@@ -0,0 +1,548 @@
+/*
+ *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "rtc_base/buffer.h"
+
+#include <cstdint>
+#include <utility>
+
+#include "absl/strings/string_view.h"
+#include "api/array_view.h"
+#include "test/gmock.h"
+#include "test/gtest.h"
+
+namespace rtc {
+
+namespace {
+
+using ::testing::ElementsAre;
+using ::testing::ElementsAreArray;
+
+// clang-format off
+const uint8_t kTestData[] = {0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7,
+                             0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf};
+// clang-format on
+
+void TestBuf(const Buffer& b1, size_t size, size_t capacity) {
+  EXPECT_EQ(b1.size(), size);
+  EXPECT_EQ(b1.capacity(), capacity);
+}
+
+}  // namespace
+
+TEST(BufferTest, TestConstructEmpty) {
+  TestBuf(Buffer(), 0, 0);
+  TestBuf(Buffer(Buffer()), 0, 0);
+  TestBuf(Buffer(0), 0, 0);
+
+  // We can't use a literal 0 for the first argument, because C++ will allow
+  // that to be considered a null pointer, which makes the call ambiguous.
+  TestBuf(Buffer(0 + 0, 10), 0, 10);
+
+  TestBuf(Buffer(kTestData, 0), 0, 0);
+  TestBuf(Buffer(kTestData, 0, 20), 0, 20);
+}
+
+TEST(BufferTest, TestConstructData) {
+  Buffer buf(kTestData, 7);
+  EXPECT_EQ(buf.size(), 7u);
+  EXPECT_EQ(buf.capacity(), 7u);
+  EXPECT_FALSE(buf.empty());
+  EXPECT_EQ(0, memcmp(buf.data(), kTestData, 7));
+}
+
+TEST(BufferTest, TestConstructDataWithCapacity) {
+  Buffer buf(kTestData, 7, 14);
+  EXPECT_EQ(buf.size(), 7u);
+  EXPECT_EQ(buf.capacity(), 14u);
+  EXPECT_FALSE(buf.empty());
+  EXPECT_EQ(0, memcmp(buf.data(), kTestData, 7));
+}
+
+TEST(BufferTest, TestConstructArray) {
+  Buffer buf(kTestData);
+  EXPECT_EQ(buf.size(), 16u);
+  EXPECT_EQ(buf.capacity(), 16u);
+  EXPECT_FALSE(buf.empty());
+  EXPECT_EQ(0, memcmp(buf.data(), kTestData, 16));
+}
+
+TEST(BufferTest, TestStringViewConversion) {
+  Buffer buf(kTestData);
+  absl::string_view view = buf;
+  EXPECT_EQ(view,
+            absl::string_view(reinterpret_cast<const char*>(kTestData), 16u));
+}
+
+TEST(BufferTest, TestSetData) {
+  Buffer buf(kTestData + 4, 7);
+  buf.SetData(kTestData, 9);
+  EXPECT_EQ(buf.size(), 9u);
+  EXPECT_EQ(buf.capacity(), 7u * 3 / 2);
+  EXPECT_FALSE(buf.empty());
+  EXPECT_EQ(0, memcmp(buf.data(), kTestData, 9));
+  Buffer buf2;
+  buf2.SetData(buf);
+  EXPECT_EQ(buf.size(), 9u);
+  EXPECT_EQ(buf.capacity(), 7u * 3 / 2);
+  EXPECT_EQ(0, memcmp(buf.data(), kTestData, 9));
+}
+
+TEST(BufferTest, TestAppendData) {
+  Buffer buf(kTestData + 4, 3);
+  buf.AppendData(kTestData + 10, 2);
+  const int8_t exp[] = {0x4, 0x5, 0x6, 0xa, 0xb};
+  EXPECT_EQ(buf, Buffer(exp));
+  Buffer buf2;
+  buf2.AppendData(buf);
+  buf2.AppendData(rtc::ArrayView<uint8_t>(buf));
+  const int8_t exp2[] = {0x4, 0x5, 0x6, 0xa, 0xb, 0x4, 0x5, 0x6, 0xa, 0xb};
+  EXPECT_EQ(buf2, Buffer(exp2));
+}
+
+TEST(BufferTest, TestSetAndAppendWithUnknownArg) {
+  struct TestDataContainer {
+    size_t size() const { return 3; }
+    const uint8_t* data() const { return kTestData; }
+  };
+  Buffer buf;
+  buf.SetData(TestDataContainer());
+  EXPECT_EQ(3u, buf.size());
+  EXPECT_EQ(Buffer(kTestData, 3), buf);
+  EXPECT_THAT(buf, ElementsAre(0, 1, 2));
+  buf.AppendData(TestDataContainer());
+  EXPECT_EQ(6u, buf.size());
+  EXPECT_EQ(0, memcmp(buf.data(), kTestData, 3));
+  EXPECT_EQ(0, memcmp(buf.data() + 3, kTestData, 3));
+  EXPECT_THAT(buf, ElementsAre(0, 1, 2, 0, 1, 2));
+}
+
+TEST(BufferTest, TestSetSizeSmaller) {
+  Buffer buf;
+  buf.SetData(kTestData, 15);
+  buf.SetSize(10);
+  EXPECT_EQ(buf.size(), 10u);
+  EXPECT_EQ(buf.capacity(), 15u);  // Hasn't shrunk.
+  EXPECT_FALSE(buf.empty());
+  EXPECT_EQ(buf, Buffer(kTestData, 10));
+}
+
+TEST(BufferTest, TestSetSizeLarger) {
+  Buffer buf;
+  buf.SetData(kTestData, 15);
+  EXPECT_EQ(buf.size(), 15u);
+  EXPECT_EQ(buf.capacity(), 15u);
+  EXPECT_FALSE(buf.empty());
+  buf.SetSize(20);
+  EXPECT_EQ(buf.size(), 20u);
+  EXPECT_EQ(buf.capacity(), 15u * 3 / 2);  // Has grown.
+  EXPECT_FALSE(buf.empty());
+  EXPECT_EQ(0, memcmp(buf.data(), kTestData, 15));
+}
+
+TEST(BufferTest, TestEnsureCapacitySmaller) {
+  Buffer buf(kTestData);
+  const char* data = buf.data<char>();
+  buf.EnsureCapacity(4);
+  EXPECT_EQ(buf.capacity(), 16u);     // Hasn't shrunk.
+  EXPECT_EQ(buf.data<char>(), data);  // No reallocation.
+  EXPECT_FALSE(buf.empty());
+  EXPECT_EQ(buf, Buffer(kTestData));
+}
+
+TEST(BufferTest, TestEnsureCapacityLarger) {
+  Buffer buf(kTestData, 5);
+  buf.EnsureCapacity(10);
+  const int8_t* data = buf.data<int8_t>();
+  EXPECT_EQ(buf.capacity(), 10u);
+  buf.AppendData(kTestData + 5, 5);
+  EXPECT_EQ(buf.data<int8_t>(), data);  // No reallocation.
+  EXPECT_FALSE(buf.empty());
+  EXPECT_EQ(buf, Buffer(kTestData, 10));
+}
+
+TEST(BufferTest, TestMoveConstruct) {
+  Buffer buf1(kTestData, 3, 40);
+  const uint8_t* data = buf1.data();
+  Buffer buf2(std::move(buf1));
+  EXPECT_EQ(buf2.size(), 3u);
+  EXPECT_EQ(buf2.capacity(), 40u);
+  EXPECT_EQ(buf2.data(), data);
+  EXPECT_FALSE(buf2.empty());
+  buf1.Clear();
+  EXPECT_EQ(buf1.size(), 0u);
+  EXPECT_EQ(buf1.capacity(), 0u);
+  EXPECT_EQ(buf1.data(), nullptr);
+  EXPECT_TRUE(buf1.empty());
+}
+
+TEST(BufferTest, TestMoveAssign) {
+  Buffer buf1(kTestData, 3, 40);
+  const uint8_t* data = buf1.data();
+  Buffer buf2(kTestData);
+  buf2 = std::move(buf1);
+  EXPECT_EQ(buf2.size(), 3u);
+  EXPECT_EQ(buf2.capacity(), 40u);
+  EXPECT_EQ(buf2.data(), data);
+  EXPECT_FALSE(buf2.empty());
+  buf1.Clear();
+  EXPECT_EQ(buf1.size(), 0u);
+  EXPECT_EQ(buf1.capacity(), 0u);
+  EXPECT_EQ(buf1.data(), nullptr);
+  EXPECT_TRUE(buf1.empty());
+}
+
+TEST(BufferTest, TestMoveAssignSelf) {
+  // Move self-assignment isn't required to produce a meaningful state, but
+  // should not leave the object in an inconsistent state. (Such inconsistent
+  // state could be caught by the DCHECKs and/or by the leak checker.) We need
+  // to be sneaky when testing this; if we're doing a too-obvious
+  // move-assign-to-self, clang's -Wself-move triggers at compile time.
+  Buffer buf(kTestData, 3, 40);
+  Buffer* buf_ptr = &buf;
+  buf = std::move(*buf_ptr);
+}
+
+TEST(BufferTest, TestSwap) {
+  Buffer buf1(kTestData, 3);
+  Buffer buf2(kTestData, 6, 40);
+  uint8_t* data1 = buf1.data();
+  uint8_t* data2 = buf2.data();
+  using std::swap;
+  swap(buf1, buf2);
+  EXPECT_EQ(buf1.size(), 6u);
+  EXPECT_EQ(buf1.capacity(), 40u);
+  EXPECT_EQ(buf1.data(), data2);
+  EXPECT_FALSE(buf1.empty());
+  EXPECT_EQ(buf2.size(), 3u);
+  EXPECT_EQ(buf2.capacity(), 3u);
+  EXPECT_EQ(buf2.data(), data1);
+  EXPECT_FALSE(buf2.empty());
+}
+
+TEST(BufferTest, TestClear) {
+  Buffer buf;
+  buf.SetData(kTestData, 15);
+  EXPECT_EQ(buf.size(), 15u);
+  EXPECT_EQ(buf.capacity(), 15u);
+  EXPECT_FALSE(buf.empty());
+  const char* data = buf.data<char>();
+  buf.Clear();
+  EXPECT_EQ(buf.size(), 0u);
+  EXPECT_EQ(buf.capacity(), 15u);     // Hasn't shrunk.
+  EXPECT_EQ(buf.data<char>(), data);  // No reallocation.
+  EXPECT_TRUE(buf.empty());
+}
+
+TEST(BufferTest, TestLambdaSetAppend) {
+  auto setter = [](rtc::ArrayView<uint8_t> av) {
+    for (int i = 0; i != 15; ++i)
+      av[i] = kTestData[i];
+    return 15;
+  };
+
+  Buffer buf1;
+  buf1.SetData(kTestData, 15);
+  buf1.AppendData(kTestData, 15);
+
+  Buffer buf2;
+  EXPECT_EQ(buf2.SetData(15, setter), 15u);
+  EXPECT_EQ(buf2.AppendData(15, setter), 15u);
+  EXPECT_EQ(buf1, buf2);
+  EXPECT_EQ(buf1.capacity(), buf2.capacity());
+  EXPECT_FALSE(buf1.empty());
+  EXPECT_FALSE(buf2.empty());
+}
+
+TEST(BufferTest, TestLambdaSetAppendSigned) {
+  auto setter = [](rtc::ArrayView<int8_t> av) {
+    for (int i = 0; i != 15; ++i)
+      av[i] = kTestData[i];
+    return 15;
+  };
+
+  Buffer buf1;
+  buf1.SetData(kTestData, 15);
+  buf1.AppendData(kTestData, 15);
+
+  Buffer buf2;
+  EXPECT_EQ(buf2.SetData<int8_t>(15, setter), 15u);
+  EXPECT_EQ(buf2.AppendData<int8_t>(15, setter), 15u);
+  EXPECT_EQ(buf1, buf2);
+  EXPECT_EQ(buf1.capacity(), buf2.capacity());
+  EXPECT_FALSE(buf1.empty());
+  EXPECT_FALSE(buf2.empty());
+}
+
+TEST(BufferTest, TestLambdaAppendEmpty) {
+  auto setter = [](rtc::ArrayView<uint8_t> av) {
+    for (int i = 0; i != 15; ++i)
+      av[i] = kTestData[i];
+    return 15;
+  };
+
+  Buffer buf1;
+  buf1.SetData(kTestData, 15);
+
+  Buffer buf2;
+  EXPECT_EQ(buf2.AppendData(15, setter), 15u);
+  EXPECT_EQ(buf1, buf2);
+  EXPECT_EQ(buf1.capacity(), buf2.capacity());
+  EXPECT_FALSE(buf1.empty());
+  EXPECT_FALSE(buf2.empty());
+}
+
+TEST(BufferTest, TestLambdaAppendPartial) {
+  auto setter = [](rtc::ArrayView<uint8_t> av) {
+    for (int i = 0; i != 7; ++i)
+      av[i] = kTestData[i];
+    return 7;
+  };
+
+  Buffer buf;
+  EXPECT_EQ(buf.AppendData(15, setter), 7u);
+  EXPECT_EQ(buf.size(), 7u);             // Size is exactly what we wrote.
+  EXPECT_GE(buf.capacity(), 7u);         // Capacity is valid.
+  EXPECT_NE(buf.data<char>(), nullptr);  // Data is actually stored.
+  EXPECT_FALSE(buf.empty());
+}
+
+TEST(BufferTest, TestMutableLambdaSetAppend) {
+  uint8_t magic_number = 17;
+  auto setter = [magic_number](rtc::ArrayView<uint8_t> av) mutable {
+    for (int i = 0; i != 15; ++i) {
+      av[i] = magic_number;
+      ++magic_number;
+    }
+    return 15;
+  };
+
+  EXPECT_EQ(magic_number, 17);
+
+  Buffer buf;
+  EXPECT_EQ(buf.SetData(15, setter), 15u);
+  EXPECT_EQ(buf.AppendData(15, setter), 15u);
+  EXPECT_EQ(buf.size(), 30u);            // Size is exactly what we wrote.
+  EXPECT_GE(buf.capacity(), 30u);        // Capacity is valid.
+  EXPECT_NE(buf.data<char>(), nullptr);  // Data is actually stored.
+  EXPECT_FALSE(buf.empty());
+
+  for (uint8_t i = 0; i != buf.size(); ++i) {
+    EXPECT_EQ(buf.data()[i], magic_number + i);
+  }
+}
+
+TEST(BufferTest, TestBracketRead) {
+  Buffer buf(kTestData, 7);
+  EXPECT_EQ(buf.size(), 7u);
+  EXPECT_EQ(buf.capacity(), 7u);
+  EXPECT_NE(buf.data(), nullptr);
+  EXPECT_FALSE(buf.empty());
+
+  for (size_t i = 0; i != 7u; ++i) {
+    EXPECT_EQ(buf[i], kTestData[i]);
+  }
+}
+
+TEST(BufferTest, TestBracketReadConst) {
+  Buffer buf(kTestData, 7);
+  EXPECT_EQ(buf.size(), 7u);
+  EXPECT_EQ(buf.capacity(), 7u);
+  EXPECT_NE(buf.data(), nullptr);
+  EXPECT_FALSE(buf.empty());
+
+  const Buffer& cbuf = buf;
+
+  for (size_t i = 0; i != 7u; ++i) {
+    EXPECT_EQ(cbuf[i], kTestData[i]);
+  }
+}
+
+TEST(BufferTest, TestBracketWrite) {
+  Buffer buf(7);
+  EXPECT_EQ(buf.size(), 7u);
+  EXPECT_EQ(buf.capacity(), 7u);
+  EXPECT_NE(buf.data(), nullptr);
+  EXPECT_FALSE(buf.empty());
+
+  for (size_t i = 0; i != 7u; ++i) {
+    buf[i] = kTestData[i];
+  }
+
+  EXPECT_THAT(buf, ElementsAreArray(kTestData, 7));
+}
+
+TEST(BufferTest, TestBeginEnd) {
+  const Buffer cbuf(kTestData);
+  Buffer buf(kTestData);
+  auto* b1 = cbuf.begin();
+  for (auto& x : buf) {
+    EXPECT_EQ(*b1, x);
+    ++b1;
+    ++x;
+  }
+  EXPECT_EQ(cbuf.end(), b1);
+  auto* b2 = buf.begin();
+  for (auto& y : cbuf) {
+    EXPECT_EQ(*b2, y + 1);
+    ++b2;
+  }
+  EXPECT_EQ(buf.end(), b2);
+}
+
+TEST(BufferTest, TestInt16) {
+  static constexpr int16_t test_data[] = {14, 15, 16, 17, 18};
+  BufferT<int16_t> buf(test_data);
+  EXPECT_EQ(buf.size(), 5u);
+  EXPECT_EQ(buf.capacity(), 5u);
+  EXPECT_NE(buf.data(), nullptr);
+  EXPECT_FALSE(buf.empty());
+  EXPECT_THAT(buf, ElementsAreArray(test_data));
+  BufferT<int16_t> buf2(test_data);
+  EXPECT_EQ(buf, buf2);
+  buf2[0] = 9;
+  EXPECT_NE(buf, buf2);
+}
+
+TEST(BufferTest, TestFloat) {
+  static constexpr float test_data[] = {14, 15, 16, 17, 18};
+  BufferT<float> buf;
+  EXPECT_EQ(buf.size(), 0u);
+  EXPECT_EQ(buf.capacity(), 0u);
+  EXPECT_EQ(buf.data(), nullptr);
+  EXPECT_TRUE(buf.empty());
+  buf.SetData(test_data);
+  EXPECT_EQ(buf.size(), 5u);
+  EXPECT_EQ(buf.capacity(), 5u);
+  EXPECT_NE(buf.data(), nullptr);
+  EXPECT_FALSE(buf.empty());
+  float* p1 = buf.data();
+  while (buf.data() == p1) {
+    buf.AppendData(test_data);
+  }
+  EXPECT_EQ(buf.size(), buf.capacity());
+  EXPECT_GT(buf.size(), 5u);
+  EXPECT_EQ(buf.size() % 5, 0u);
+  EXPECT_NE(buf.data(), nullptr);
+  for (size_t i = 0; i != buf.size(); ++i) {
+    EXPECT_EQ(test_data[i % 5], buf[i]);
+  }
+}
+
+TEST(BufferTest, TestStruct) {
+  struct BloodStone {
+    bool blood;
+    const char* stone;
+  };
+  BufferT<BloodStone> buf(4);
+  EXPECT_EQ(buf.size(), 4u);
+  EXPECT_EQ(buf.capacity(), 4u);
+  EXPECT_NE(buf.data(), nullptr);
+  EXPECT_FALSE(buf.empty());
+  BufferT<BloodStone*> buf2(4);
+  for (size_t i = 0; i < buf2.size(); ++i) {
+    buf2[i] = &buf[i];
+  }
+  static const char kObsidian[] = "obsidian";
+  buf2[2]->stone = kObsidian;
+  EXPECT_EQ(kObsidian, buf[2].stone);
+}
+
+TEST(BufferDeathTest, DieOnUseAfterMove) {
+  Buffer buf(17);
+  Buffer buf2 = std::move(buf);
+  EXPECT_EQ(buf2.size(), 17u);
+#if RTC_DCHECK_IS_ON
+#if GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)
+  EXPECT_DEATH(buf.empty(), "");
+#endif
+#else
+  EXPECT_TRUE(buf.empty());
+#endif
+}
+
+TEST(ZeroOnFreeBufferTest, TestZeroOnSetData) {
+  ZeroOnFreeBuffer<uint8_t> buf(kTestData, 7);
+  const uint8_t* old_data = buf.data();
+  const size_t old_capacity = buf.capacity();
+  const size_t old_size = buf.size();
+  constexpr size_t offset = 1;
+  buf.SetData(kTestData + offset, 2);
+  // Sanity checks to make sure the underlying heap memory was not reallocated.
+  EXPECT_EQ(old_data, buf.data());
+  EXPECT_EQ(old_capacity, buf.capacity());
+  // The first two elements have been overwritten, and the remaining five have
+  // been zeroed.
+  EXPECT_EQ(kTestData[offset], buf[0]);
+  EXPECT_EQ(kTestData[offset + 1], buf[1]);
+  for (size_t i = 2; i < old_size; i++) {
+    EXPECT_EQ(0, old_data[i]);
+  }
+}
+
+TEST(ZeroOnFreeBufferTest, TestZeroOnSetDataFromSetter) {
+  static constexpr size_t offset = 1;
+  const auto setter = [](rtc::ArrayView<uint8_t> av) {
+    for (int i = 0; i != 2; ++i)
+      av[i] = kTestData[offset + i];
+    return 2;
+  };
+
+  ZeroOnFreeBuffer<uint8_t> buf(kTestData, 7);
+  const uint8_t* old_data = buf.data();
+  const size_t old_capacity = buf.capacity();
+  const size_t old_size = buf.size();
+  buf.SetData(2, setter);
+  // Sanity checks to make sure the underlying heap memory was not reallocated.
+  EXPECT_EQ(old_data, buf.data());
+  EXPECT_EQ(old_capacity, buf.capacity());
+  // The first two elements have been overwritten, and the remaining five have
+  // been zeroed.
+  EXPECT_EQ(kTestData[offset], buf[0]);
+  EXPECT_EQ(kTestData[offset + 1], buf[1]);
+  for (size_t i = 2; i < old_size; i++) {
+    EXPECT_EQ(0, old_data[i]);
+  }
+}
+
+TEST(ZeroOnFreeBufferTest, TestZeroOnSetSize) {
+  ZeroOnFreeBuffer<uint8_t> buf(kTestData, 7);
+  const uint8_t* old_data = buf.data();
+  const size_t old_capacity = buf.capacity();
+  const size_t old_size = buf.size();
+  buf.SetSize(2);
+  // Sanity checks to make sure the underlying heap memory was not reallocated.
+  EXPECT_EQ(old_data, buf.data());
+  EXPECT_EQ(old_capacity, buf.capacity());
+  // The first two elements have not been modified and the remaining five have
+  // been zeroed.
+  EXPECT_EQ(kTestData[0], buf[0]);
+  EXPECT_EQ(kTestData[1], buf[1]);
+  for (size_t i = 2; i < old_size; i++) {
+    EXPECT_EQ(0, old_data[i]);
+  }
+}
+
+TEST(ZeroOnFreeBufferTest, TestZeroOnClear) {
+  ZeroOnFreeBuffer<uint8_t> buf(kTestData, 7);
+  const uint8_t* old_data = buf.data();
+  const size_t old_capacity = buf.capacity();
+  const size_t old_size = buf.size();
+  buf.Clear();
+  // Sanity checks to make sure the underlying heap memory was not reallocated.
+  EXPECT_EQ(old_data, buf.data());
+  EXPECT_EQ(old_capacity, buf.capacity());
+  // The underlying memory was not released but cleared.
+  for (size_t i = 0; i < old_size; i++) {
+    EXPECT_EQ(0, old_data[i]);
+  }
+}
+
+}  // namespace rtc